Grand Som, Limestone mountain in Chartreuse Mountains, France
The Grand Som rises to 2026 meters in elevation, featuring a sharp ridge that extends across the Chartreuse Mountains with steep limestone cliffs.
The mountain's cave system, including Puits Francis, was first explored in July 1966 by the La Tronche caving club, reaching a depth of 1565 meters.
Two relief tables and a cross mark the summit, serving as reference points for visitors to identify surrounding geographical features of the French Prealps.
Multiple marked hiking trails lead to the summit from different starting points, with the main route classified as difficulty level T2 for experienced hikers.
The mountain contains numerous deep chasms, including five major cave networks that extend hundreds of meters below the surface.
Location: Isère
Elevation above the sea: 2,026 m
Made from material: limestone
GPS coordinates: 45.37045,5.81200
Latest update: June 23, 2025 09:47
Grande Chartreuse
1.6 km
Chartreuse Regional Natural Park
2.4 km
Charmant Som
6.3 km
Chartreuse de Currières
5.5 km
Scenic viewpoint
966 m
Musée de la Grande Chartreuse
2.8 km
Musée Arcabas en Chartreuse
5.3 km
Lances de Malissard
5.5 km
Gorges du Guiers Mort
4.6 km
Gorges du Guiers Vif
6.2 km
Église Saint-Hugues-de-Chartreuse
5.3 km
Le Planolet
2 km
La Scia
3.9 km
Château de Montbel
5.4 km
Roc d'Arguille
6.3 km
Vallée des Entremonts
6.1 km
Chapelle des Dix-Mille Martyrs
6.2 km
Église Saint-Laurent de Saint-Laurent-du-Pont
6.6 km
Église Saint-Pierre de Saint-Pierre-d'Entremont
6 km
Porte de l'Enclos
3.1 km
Pont de la Petite Vache
4.7 km
Scenic viewpoint
3.3 km
Église Saint-Jean-Baptiste de Corbel
6.6 km
Église Saint-Pierre de Saint-Pierre-de-Chartreuse
3.1 km
Église Saint-Alexis de Saint-Pierre-d'Entremont
6.3 km
Chapelle Saint-Bruno
1.4 km
Distillerie des Chartreux de Fourvoirie
5.3 km
Motherhouse of the Monastic Family of Bethlehem, of the Assumption of the Virgin and of Saint Bruno
5.5 kmReviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes